This book brings a compilation about the main occupational and work-related diseases, describing in a clear and objective way which are the characteristics of the clinical pictures aiming to contribute to the identification by the professionals of technical level in Work Safety and Nursing of the workers with work-related diseases, in an early way, so that the intervention in the work environment is fast, preventing the evolution to chronic and incurable pictures. The main objective is to encourage the discussion about the exposures in work environments and the clinical pictures that workers can present so that there is the correct establishment of the causal link, promoting quality of life for formal and informal workers.